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.TH "MONGOOPLOG" "1" "January 30, 2015" "3.0" "mongodb-manual"
.SH NAME
mongooplog \- MongoDB Oplog Utility
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.sp
New in version 2.2.

.SH SYNOPSIS
.sp
\fBmongooplog\fP is a simple tool that polls operations from
the \fIreplication\fP \fIoplog\fP of a remote server, and applies
them to the local server. This capability supports certain classes of
real\-time migrations that require that the source server remain online
and in operation throughout the migration process.
.sp
Typically this command will take the following form:
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.sp
.nf
.ft C
mongooplog  \-\-from mongodb0.example.net \-\-host mongodb1.example.net
.ft P
.fi
.UNINDENT
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.sp
This command copies oplog entries from the \fBmongod\fP instance
running on the host \fBmongodb0.example.net\fP and duplicates
operations to the host \fBmongodb1.example.net\fP\&. If you do not need
to keep the \fI\-\-from\fP host running during
the migration, consider using \fBmongodump\fP and
\fBmongorestore\fP or another \fBbackup\fP operation, which may be better suited to
your operation.
.sp
\fBNOTE:\fP
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.INDENT 3.5
If the \fBmongod\fP instance specified by the \fI\-\-from\fP
argument is running with \fBauthentication\fP, then
\fBmongooplog\fP will not be able to copy oplog entries.
.UNINDENT
.UNINDENT
.sp
\fBSEE ALSO:\fP
.INDENT 0.0
.INDENT 3.5
\fBmongodump\fP, \fBmongorestore\fP,
http://docs.mongodb.org/manual/core/backups, http://docs.mongodb.org/manual/core/replica\-set\-oplog\&.
.UNINDENT
.UNINDENT
.SH OPTIONS
.sp
Changed in version 3.0.0: \fBmongooplog\fP removed the \fB\-\-dbpath\fP as well as related
\fB\-\-directoryperdb\fP and \fB\-\-journal\fP options. You must use
\fBmongooplog\fP while connected to a \fBmongod\fP instance.

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.TP
.B mongooplog
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.TP
.B mongooplog
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.TP
.B \-\-help
Returns information on the options and use of \fBmongooplog\fP\&.
.UNINDENT
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.TP
.B \-\-verbose, \-v
Increases the amount of internal reporting returned on standard output
or in log files. Increase the verbosity with the \fB\-v\fP form by
including the option multiple times, (e.g. \fB\-vvvvv\fP\&.)
.UNINDENT
.INDENT 0.0
.TP
.B \-\-quiet
Runs the \fBmongooplog\fP in a quiet mode that attempts to limit the amount
of output.
.sp
This option suppresses:
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.IP \(bu 2
connection accepted events
.IP \(bu 2
connection closed events
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.TP
.B \-\-version
Returns the \fBmongooplog\fP release number.
.UNINDENT
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.TP
.B \-\-host <hostname><:port>, \-h <hostname><:port>
Specifies a resolvable hostname for the \fBmongod\fP instance to
which \fBmongooplog\fP will apply \fIoplog\fP operations
retrieved from the server specified by the \fI\-\-from\fP option.
.sp
By default \fBmongooplog\fP attempts to connect to a MongoDB instance running
on the localhost on port number \fB27017\fP\&.
.sp
To connect to a replica set, specify the \fBreplica set name\fP and a seed list of set members. Use the
following form:
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.sp
.nf
.ft C
<replSetName>/<hostname1><:port>,<hostname2><:port>,<...>
.ft P
.fi
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.sp
You can always connect directly to a single MongoDB instance by
specifying the host and port number directly.
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.TP
.B \-\-port
Specifies the port number of the \fBmongod\fP instance where
\fBmongooplog\fP will apply \fIoplog\fP entries. Specify
this option only if the MongoDB instance to connect to is not
running on the standard port of \fB27017\fP\&. You may also specify a
port number using the \fI\-\-host\fP command.
.UNINDENT
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.TP
.B \-\-ipv6
Enables IPv6 support and allows the \fBmongooplog\fP to connect to the
MongoDB instance using an IPv6 network. All MongoDB programs and
processes disable IPv6 support by default.
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.TP
.B \-\-ssl
New in version 2.6.

.sp
Enables connection to a \fBmongod\fP or \fBmongos\fP that has
SSL support enabled.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.TP
.B \-\-sslCAFile <filename>
New in version 2.6.

.sp
Specifies the \fB\&.pem\fP file that contains the root certificate chain
from the Certificate Authority. Specify the file name of the
\fB\&.pem\fP file using relative or absolute paths.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
.sp
\fBWARNING:\fP
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If the \fBmongo\fP shell or any other tool that connects to
\fBmongos\fP or \fBmongod\fP is run without
\fI\-\-sslCAFile\fP, it will not attempt to validate
server certificates. This results in vulnerability to expired
\fBmongod\fP and \fBmongos\fP certificates as well as to foreign
processes posing as valid \fBmongod\fP or \fBmongos\fP
instances. Ensure that you \fIalways\fP specify the CA file against which
server certificates should be validated in cases where intrusion is a
possibility.
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.TP
.B \-\-sslPEMKeyFile <filename>
New in version 2.6.

.sp
Specifies the \fB\&.pem\fP file that contains both the SSL certificate
and key. Specify the file name of the \fB\&.pem\fP file using relative
or absolute paths.
.sp
This option is required when using the \fI\-\-ssl\fP option to connect
to a \fBmongod\fP or \fBmongos\fP that has
\fBCAFile\fP enabled \fIwithout\fP
\fBallowConnectionsWithoutCertificates\fP\&.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.TP
.B \-\-sslPEMKeyPassword <value>
New in version 2.6.

.sp
Specifies the password to de\-crypt the certificate\-key file (i.e.
\fI\-\-sslPEMKeyFile\fP). Use the \fI\-\-sslPEMKeyPassword\fP option only if the
certificate\-key file is encrypted. In all cases, the \fBmongooplog\fP will
redact the password from all logging and reporting output.
.sp
If the private key in the PEM file is encrypted and you do not specify
the \fI\-\-sslPEMKeyPassword\fP option, the \fBmongooplog\fP will prompt for a passphrase. See
\fIssl\-certificate\-password\fP\&.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.TP
.B \-\-sslCRLFile <filename>
New in version 2.6.

.sp
Specifies the \fB\&.pem\fP file that contains the Certificate Revocation
List. Specify the file name of the \fB\&.pem\fP file using relative or
absolute paths.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
.UNINDENT
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.TP
.B \-\-sslAllowInvalidCertificates
New in version 2.6.

.sp
Bypasses the validation checks for server certificates and allows
the use of invalid certificates. When using the
\fBallowInvalidCertificates\fP setting, MongoDB logs as a
warning the use of the invalid certificate.
.sp
The default distribution of MongoDB does not contain support for SSL.
For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
.UNINDENT
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.TP
.B \-\-sslAllowInvalidHostnames
New in version 3.0.

.sp
Disables the validation of the hostnames in SSL certificates. Allows
\fBmongooplog\fP to connect to MongoDB instances if the hostname their
certificates do not match the specified hostname.
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.TP
.B \-\-sslFIPSMode
New in version 2.6.

.sp
Directs the \fBmongooplog\fP to use the FIPS mode of the installed OpenSSL
library. Your system must have a FIPS compliant OpenSSL library to use
the \fI\-\-sslFIPSMode\fP option.
.sp
\fBNOTE:\fP
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FIPS Compatible SSL is
available only in \fI\%MongoDB Enterprise\fP\&. See
http://docs.mongodb.org/manual/tutorial/configure\-fips for more information.
.UNINDENT
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.TP
.B \-\-username <username>, \-u <username>
Specifies a username with which to authenticate to a MongoDB database
that uses authentication. Use in conjunction with the \fB\-\-password\fP and
\fB\-\-authenticationDatabase\fP options.
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.TP
.B \-\-password <password>, \-p <password>
Specifies a password with which to authenticate to a MongoDB database
that uses authentication. Use in conjunction with the \fB\-\-username\fP and
\fB\-\-authenticationDatabase\fP options.
.sp
If you do not specify an argument for \fI\-\-password\fP, \fBmongooplog\fP will
prompt interactively for a password on the console.
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.TP
.B \-\-authenticationDatabase <dbname>
New in version 2.4.

.sp
Specifies the database that holds the user\(aqs credentials.
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.TP
.B \-\-authenticationMechanism <name>
\fIDefault\fP: MONGODB\-CR
.sp
New in version 2.4.

.sp
Changed in version 2.6: Added support for the \fBPLAIN\fP and \fBMONGODB\-X509\fP authentication
mechanisms.

.sp
Specifies the authentication mechanism the \fBmongooplog\fP instance uses to
authenticate to the \fBmongod\fP or \fBmongos\fP\&.
.TS
center;
|l|l|.
_
T{
Value
T}	T{
Description
T}
_
T{
MONGODB\-CR
T}	T{
MongoDB challenge/response authentication.
T}
_
T{
MONGODB\-X509
T}	T{
MongoDB SSL certificate authentication.
T}
_
T{
PLAIN
T}	T{
External authentication using LDAP. You can also use \fBPLAIN\fP
for authenticating in\-database users. \fBPLAIN\fP transmits
passwords in plain text. This mechanism is available only in
\fI\%MongoDB Enterprise\fP\&.
T}
_
T{
GSSAPI
T}	T{
External authentication using Kerberos. This mechanism is
available only in \fI\%MongoDB Enterprise\fP\&.
T}
_
.TE
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.TP
.B \-\-gssapiServiceName
New in version 2.6.

.sp
Specify the name of the service using \fBGSSAPI/Kerberos\fP\&. Only required if the service does not use the
default name of \fBmongodb\fP\&.
.sp
This option is available only in MongoDB Enterprise.
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.TP
.B \-\-gssapiHostName
New in version 2.6.

.sp
Specify the hostname of a service using \fBGSSAPI/Kerberos\fP\&. \fIOnly\fP required if the hostname of a machine does
not match the hostname resolved by DNS.
.sp
This option is available only in MongoDB Enterprise.
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.TP
.B \-\-db <database>, \-d <database>
Specifies the name of the database on which to run the \fBmongooplog\fP\&.
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.TP
.B \-\-collection <collection>, \-c <collection>
Specifies the collection to export.
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.TP
.B \-\-seconds <number>, \-s <number>
Specify a number of seconds of operations for \fBmongooplog\fP to
pull from the \fIremote host\fP\&. Unless
specified the default value is \fB86400\fP seconds, or 24 hours.
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.B \-\-from <host[:port]>
Specify the host for \fBmongooplog\fP to retrieve \fIoplog\fP
operations from. \fBmongooplog\fP \fIrequires\fP this option.
.sp
Unless you specify the \fI\-\-host\fP option,
\fBmongooplog\fP will apply the operations collected with this
option to the oplog of the \fBmongod\fP instance running on the
localhost interface connected to port \fB27017\fP\&.
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.B \-\-oplogns <namespace>
Specify a namespace in the \fI\-\-from\fP host
where the oplog resides. The default value is \fBlocal.oplog.rs\fP, which
is the where \fIreplica set\fP members store their operation log.
However, if you\(aqve copied \fIoplog\fP entries into another
database or collection or are pulling oplog entries from a
\fBmaster\-slave\fP deployment, use \fI\%\-\-oplogns\fP to
apply oplog entries stored in another location. Namespaces take the
form of \fB[database].[collection]\fP\&.
.UNINDENT
.SH USE
.sp
Consider the following prototype \fBmongooplog\fP command:
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.nf
.ft C
mongooplog  \-\-from mongodb0.example.net \-\-host mongodb1.example.net
.ft P
.fi
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.sp
Here, entries from the \fIoplog\fP of the \fBmongod\fP running
on port \fB27017\fP\&. This only pull entries from the last 24 hours.
.sp
Use the \fI\-\-seconds\fP argument to capture
a greater or smaller amount of time. Consider the following example:
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.sp
.nf
.ft C
mongooplog  \-\-from mongodb0.example.net \-\-seconds 172800
.ft P
.fi
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.sp
In this operation, \fBmongooplog\fP captures 2 full days of
operations. To migrate 12 hours of \fIoplog\fP entries, use the
following form:
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.sp
.nf
.ft C
mongooplog  \-\-from mongodb0.example.net \-\-seconds 43200
.ft P
.fi
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.UNINDENT
.SH AUTHOR
MongoDB Documentation Project
.SH COPYRIGHT
2011-2015
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